From a09c2e556f9421da9f0e7e74b98c89a5599b17f8 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Wed, 14 Aug 2002 12:27:22 +0000
Subject: [PATCH] BOOST_NO_EXCEPTIONS support added.

[SVN r14835]
---
 include/boost/detail/shared_array_nmt.hpp | 44 +++++++++++++++--------
 include/boost/detail/shared_count.hpp     | 18 +++++++++-
 include/boost/detail/shared_ptr_nmt.hpp   | 29 +++++++++++----
 include/boost/shared_ptr.hpp              |  5 +--
 4 files changed, 73 insertions(+), 23 deletions(-)

diff --git a/include/boost/detail/shared_array_nmt.hpp b/include/boost/detail/shared_array_nmt.hpp
index 3ff1954..8e9b727 100644
--- a/include/boost/detail/shared_array_nmt.hpp
+++ b/include/boost/detail/shared_array_nmt.hpp
@@ -17,11 +17,13 @@
 
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
 #include <boost/detail/atomic_count.hpp>
 
-#include <cstddef>            // for std::ptrdiff_t
-#include <algorithm>          // for std::swap
-#include <functional>         // for std::less
+#include <cstddef>          // for std::ptrdiff_t
+#include <algorithm>        // for std::swap
+#include <functional>       // for std::less
+#include <new>              // for std::bad_alloc
 
 namespace boost
 {
@@ -38,22 +40,36 @@ public:
       
     explicit shared_array(T * p = 0): px(p)
     {
+#ifndef BOOST_NO_EXCEPTIONS
+
         try  // prevent leak if new throws
         {
             pn = new count_type(1);
         }
         catch(...)
         {
-            checked_array_delete(p);
+            boost::checked_array_delete(p);
             throw;
-        } 
+        }
+
+#else
+
+        pn = new count_type(1);
+
+        if(pn == 0)
+        {
+            boost::checked_array_delete(p);
+            boost::throw_exception(std::bad_alloc());
+        }
+
+#endif
     }
-      
+
     ~shared_array()
     {
         if(--*pn == 0)
         {
-            checked_array_delete(px);
+            boost::checked_array_delete(px);
             delete pn;
         }
     }
@@ -63,19 +79,19 @@ public:
         pn = r.pn;
         ++*pn;
     }
-      
+
     shared_array & operator=(shared_array const & r)
     {
         shared_array(r).swap(*this);
         return *this;
     }
-      
+
     void reset(T * p = 0)
     {
         BOOST_ASSERT(p == 0 || p != px);
         shared_array(p).swap(*this);
     }
-      
+
     T * get() const  // never throws
     {
         return px;
@@ -87,7 +103,7 @@ public:
         BOOST_ASSERT(i >= 0);
         return px[i];
     }
-      
+
     long use_count() const  // never throws
     {
         return *pn;
@@ -97,15 +113,15 @@ public:
     {
         return *pn == 1;
     }
-    
+
     void swap(shared_array<T> & other)  // never throws
     {
         std::swap(px, other.px);
         std::swap(pn, other.pn);
     }
-      
+
 private:
-      
+
     T * px;            // contained pointer
     count_type * pn;   // ptr to reference counter
       
diff --git a/include/boost/detail/shared_count.hpp b/include/boost/detail/shared_count.hpp
index 673a632..17aeb9d 100644
--- a/include/boost/detail/shared_count.hpp
+++ b/include/boost/detail/shared_count.hpp
@@ -23,10 +23,12 @@
 #endif
 
 #include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
 #include <boost/detail/lightweight_mutex.hpp>
 
 #include <functional>       // for std::less
 #include <exception>        // for std::exception
+#include <new>              // for std::bad_alloc
 
 #ifdef __BORLANDC__
 # pragma warn -8026     // Functions with excep. spec. are not expanded inline
@@ -95,7 +97,7 @@ public:
 #ifdef BOOST_HAS_THREADS
         mutex_type::scoped_lock lock(mtx_);
 #endif
-        if(use_count_ == 0 && weak_count_ != 0) throw use_count_is_zero();
+        if(use_count_ == 0 && weak_count_ != 0) boost::throw_exception(boost::use_count_is_zero());
         ++use_count_;
         ++weak_count_;
     }
@@ -235,6 +237,8 @@ public:
 
     template<class P, class D> shared_count(P p, D d, void const * = 0): pi_(0)
     {
+#ifndef BOOST_NO_EXCEPTIONS
+
         try
         {
             pi_ = new counted_base_impl<P, D>(p, d, 1, 1);
@@ -244,6 +248,18 @@ public:
             d(p); // delete p
             throw;
         }
+
+#else
+
+        pi_ = new counted_base_impl<P, D>(p, d, 1, 1);
+
+        if(pi_ == 0)
+        {
+            d(p); // delete p
+            boost::throw_exception(std::bad_alloc());
+        }
+
+#endif
     }
 
     template<class P, class D> shared_count(P, D, counted_base * pi): pi_(pi)
diff --git a/include/boost/detail/shared_ptr_nmt.hpp b/include/boost/detail/shared_ptr_nmt.hpp
index 79d5b5d..14fbe65 100644
--- a/include/boost/detail/shared_ptr_nmt.hpp
+++ b/include/boost/detail/shared_ptr_nmt.hpp
@@ -17,14 +17,16 @@
 
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
 #include <boost/detail/atomic_count.hpp>
 
 #ifndef BOOST_NO_AUTO_PTR
-#include <memory>             // for std::auto_ptr
+# include <memory>          // for std::auto_ptr
 #endif
 
-#include <algorithm>          // for std::swap
-#include <functional>         // for std::less
+#include <algorithm>        // for std::swap
+#include <functional>       // for std::less
+#include <new>              // for std::bad_alloc
 
 namespace boost
 {
@@ -38,25 +40,40 @@ private:
 public:
 
     typedef T element_type;
+    typedef T value_type;
 
     explicit shared_ptr(T * p = 0): px(p)
     {
+#ifndef BOOST_NO_EXCEPTIONS
+
         try  // prevent leak if new throws
         {
             pn = new count_type(1);
         }
         catch(...)
         {
-            checked_delete(p);
+            boost::checked_delete(p);
             throw;
-        } 
+        }
+
+#else
+
+        pn = new count_type(1);
+
+        if(pn == 0)
+        {
+            boost::checked_delete(p);
+            boost::throw_exception(std::bad_alloc());
+        }
+
+#endif
     }
 
     ~shared_ptr()
     {
         if(--*pn == 0)
         {
-            checked_delete(px);
+            boost::checked_delete(px);
             delete pn;
         }
     }
diff --git a/include/boost/shared_ptr.hpp b/include/boost/shared_ptr.hpp
index 2634929..8f55948 100644
--- a/include/boost/shared_ptr.hpp
+++ b/include/boost/shared_ptr.hpp
@@ -23,7 +23,7 @@
 
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
-
+#include <boost/throw_exception.hpp>
 #include <boost/detail/shared_count.hpp>
 
 #include <memory>             // for std::auto_ptr
@@ -90,6 +90,7 @@ private:
 public:
 
     typedef T element_type;
+    typedef T value_type;
 
     shared_ptr(): px(0), pn()
     {
@@ -146,7 +147,7 @@ public:
     {
         if (px == 0)
         {
-            throw std::bad_cast();
+            boost::throw_exception(std::bad_cast());
         }
     }